1/*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21
22#include <sys/zfs_context.h>
23#include <sys/spa.h>
24#include <sys/spa_impl.h>
25#include <sys/dmu.h>
26#include <sys/zap.h>
27#include <sys/vdev.h>
28#include <sys/vdev_os.h>
29#include <sys/vdev_impl.h>
30#include <sys/uberblock_impl.h>
31#include <sys/metaslab.h>
32#include <sys/metaslab_impl.h>
33#include <sys/zio.h>
34#include <sys/dsl_scan.h>
35#include <sys/abd.h>
36#include <sys/fs/zfs.h>
37
38int
39vdev_label_write_pad2(vdev_t *vd, const char *buf, size_t size)
40{
41	spa_t *spa = vd->vdev_spa;
42	zio_t *zio;
43	abd_t *pad2;
44	int flags = ZIO_FLAG_CONFIG_WRITER | ZIO_FLAG_CANFAIL;
45	int error;
46
47	if (size > VDEV_PAD_SIZE)
48		return (EINVAL);
49
50	if (!vd->vdev_ops->vdev_op_leaf)
51		return (ENODEV);
52	if (vdev_is_dead(vd))
53		return (ENXIO);
54
55	ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == SCL_ALL);
56
57	pad2 = abd_alloc_for_io(VDEV_PAD_SIZE, B_TRUE);
58	abd_zero(pad2, VDEV_PAD_SIZE);
59	abd_copy_from_buf(pad2, buf, size);
60
61retry:
62	zio = zio_root(spa, NULL, NULL, flags);
63	vdev_label_write(zio, vd, 0, pad2,
64	    offsetof(vdev_label_t, vl_be),
65	    VDEV_PAD_SIZE, NULL, NULL, flags);
66	error = zio_wait(zio);
67	if (error != 0 && !(flags & ZIO_FLAG_TRYHARD)) {
68		flags |= ZIO_FLAG_TRYHARD;
69		goto retry;
70	}
71
72	abd_free(pad2);
73	return (error);
74}
75